package thread;

import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;

public class ThreadPoolDemo {
    public static void main(String[] args) {
        ExecutorService threadfool = Executors.newFixedThreadPool(3);
        for (int i=0;i<5;i++){
            Runnable r = ()-> {
                    try {
                        Thread t = Thread.currentThread();
                        System.out.println(t.getName()+":正在执行一个任务");
                        Thread.sleep(5000);
                        System.out.println(t.getName()+":执行任务完毕");
                    } catch (InterruptedException e) {
                        e.printStackTrace();
                    }
            };
            threadfool.execute(r);
            System.out.println("将一个任务交给了线程池");
        }
        //threadfool.shutdown();//停止线程池
        //System.out.println("停止线程池");
        threadfool.shutdownNow();//立即停止线程池
        System.out.println("停止线程池");
    }
}
